1 /*
2 * Copyright (c) 1999, 2022, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.code;
27
28 import java.util.Collection;
29 import java.util.Collections;
30 import java.util.EnumSet;
31 import java.util.HashMap;
32 import java.util.LinkedHashMap;
33 import java.util.Map;
34
35 import javax.lang.model.element.ElementVisitor;
36
37 import com.sun.tools.javac.code.Scope.WriteableScope;
38 import com.sun.tools.javac.code.Source.Feature;
39 import com.sun.tools.javac.code.Symbol.ClassSymbol;
40 import com.sun.tools.javac.code.Symbol.Completer;
41 import com.sun.tools.javac.code.Symbol.CompletionFailure;
42 import com.sun.tools.javac.code.Symbol.MethodSymbol;
43 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
44 import com.sun.tools.javac.code.Symbol.PackageSymbol;
45 import com.sun.tools.javac.code.Symbol.RootPackageSymbol;
46 import com.sun.tools.javac.code.Symbol.TypeSymbol;
47 import com.sun.tools.javac.code.Symbol.VarSymbol;
48 import com.sun.tools.javac.code.Type.BottomType;
49 import com.sun.tools.javac.code.Type.ClassType;
50 import com.sun.tools.javac.code.Type.ErrorType;
51 import com.sun.tools.javac.code.Type.JCPrimitiveType;
52 import com.sun.tools.javac.code.Type.JCVoidType;
53 import com.sun.tools.javac.code.Type.MethodType;
54 import com.sun.tools.javac.code.Type.UnknownType;
55 import com.sun.tools.javac.code.Type.WildcardType;
56 import com.sun.tools.javac.code.Types.UniqueType;
57 import com.sun.tools.javac.comp.Modules;
58 import com.sun.tools.javac.jvm.Target;
59 import com.sun.tools.javac.util.Assert;
60 import com.sun.tools.javac.util.Context;
61 import com.sun.tools.javac.util.Convert;
62 import com.sun.tools.javac.util.DefinedBy;
63 import com.sun.tools.javac.util.DefinedBy.Api;
64 import com.sun.tools.javac.util.Iterators;
65 import com.sun.tools.javac.util.JavacMessages;
66 import com.sun.tools.javac.util.List;
67 import com.sun.tools.javac.util.Name;
68 import com.sun.tools.javac.util.Names;
69 import com.sun.tools.javac.util.Options;
70
71 import static com.sun.tools.javac.code.Flags.*;
72 import static com.sun.tools.javac.code.Kinds.Kind.*;
73 import static com.sun.tools.javac.code.TypeTag.*;
74
75 /** A class that defines all predefined constants and operators
76 * as well as special classes such as java.lang.Object, which need
77 * to be known to the compiler. All symbols are held in instance
78 * fields. This makes it possible to work in multiple concurrent
79 * projects, which might use different class files for library classes.
80 *
81 * <p><b>This is NOT part of any supported API.
82 * If you write code that depends on this, you do so at your own risk.
83 * This code and its internal interfaces are subject to change or
84 * deletion without notice.</b>
85 */
86 public class Symtab {
87 /** The context key for the symbol table. */
88 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
89
90 /** Get the symbol table instance. */
91 public static Symtab instance(Context context) {
92 Symtab instance = context.get(symtabKey);
93 if (instance == null)
94 instance = new Symtab(context);
95 return instance;
96 }
97
98 private final boolean allowPrimitiveClasses;
99
100 /** Builtin types.
101 */
102 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
103 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
104 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
105 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
106 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
107 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
108 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
109 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
110 public final Type botType = new BottomType();
111 public final JCVoidType voidType = new JCVoidType();
112
113 private final Names names;
114 private final JavacMessages messages;
115 private final Completer initialCompleter;
116 private final Completer moduleCompleter;
117
118 /** A symbol for the unnamed module.
119 */
120 public final ModuleSymbol unnamedModule;
121
122 /** The error module.
123 */
124 public final ModuleSymbol errModule;
125
126 /** A symbol for no module, for use with -source 8 or less
127 */
128 public final ModuleSymbol noModule;
129
130 /** A symbol for the root package.
131 */
132 public final PackageSymbol rootPackage;
133
134 /** A symbol that stands for a missing symbol.
135 */
136 public final TypeSymbol noSymbol;
137
138 /** The error symbol.
139 */
140 public final ClassSymbol errSymbol;
141
142 /** The unknown symbol.
143 */
144 public final ClassSymbol unknownSymbol;
145
146 /** A value for the errType, with a originalType of noType */
147 public final Type errType;
148
149 /** A value for the unknown type. */
150 public final Type unknownType;
151
152 /** The builtin type of all arrays. */
153 public final ClassSymbol arrayClass;
154 public final MethodSymbol arrayCloneMethod;
155
156 /** VGJ: The (singleton) type of all bound types. */
157 public final ClassSymbol boundClass;
158
159 /** The builtin type of all methods. */
160 public final ClassSymbol methodClass;
161
162 /** A symbol for the java.base module.
163 */
164 public final ModuleSymbol java_base;
165
166 /** Predefined types.
167 */
168 public final Type objectType;
169 public final Type objectMethodsType;
170 public final Type objectsType;
171 public final Type classType;
172 public final Type classLoaderType;
173 public final Type stringType;
174 public final Type stringBufferType;
175 public final Type stringBuilderType;
176 public final Type cloneableType;
177 public final Type serializableType;
178 public final Type serializedLambdaType;
179 public final Type varHandleType;
180 public final Type methodHandleType;
181 public final Type methodHandleLookupType;
182 public final Type methodTypeType;
183 public final Type nativeHeaderType;
184 public final Type throwableType;
185 public final Type errorType;
186 public final Type interruptedExceptionType;
187 public final Type illegalArgumentExceptionType;
188 public final Type exceptionType;
189 public final Type runtimeExceptionType;
190 public final Type classNotFoundExceptionType;
191 public final Type noClassDefFoundErrorType;
192 public final Type noSuchFieldErrorType;
193 public final Type assertionErrorType;
194 public final Type incompatibleClassChangeErrorType;
195 public final Type cloneNotSupportedExceptionType;
196 public final Type matchExceptionType;
197 public final Type nullPointerExceptionType;
198 public final Type annotationType;
199 public final TypeSymbol enumSym;
200 public final Type listType;
201 public final Type collectionsType;
202 public final Type comparableType;
203 public final Type comparatorType;
204 public final Type arraysType;
205 public final Type iterableType;
206 public final Type iteratorType;
207 public final Type annotationTargetType;
208 public final Type overrideType;
209 public final Type retentionType;
210 public final Type deprecatedType;
211 public final Type suppressWarningsType;
212 public final Type supplierType;
213 public final Type inheritedType;
214 public final Type profileType;
215 public final Type proprietaryType;
216 public final Type systemType;
217 public final Type autoCloseableType;
218 public final Type trustMeType;
219 public final Type lambdaMetafactory;
220 public final Type stringConcatFactory;
221 public final Type repeatableType;
222 public final Type documentedType;
223 public final Type elementTypeType;
224 public final Type functionalInterfaceType;
225 public final Type previewFeatureType;
226 public final Type previewFeatureInternalType;
227 public final Type typeDescriptorType;
228 public final Type recordType;
229 public final Type switchBootstrapsType;
230 public final Type valueBasedType;
231 public final Type valueBasedInternalType;
232
233 // For serialization lint checking
234 public final Type objectStreamFieldType;
235 public final Type objectInputStreamType;
236 public final Type objectOutputStreamType;
237 public final Type ioExceptionType;
238 public final Type objectStreamExceptionType;
239 public final Type externalizableType;
240
241 /** The symbol representing the length field of an array.
242 */
243 public final VarSymbol lengthVar;
244
245 /** The symbol representing the final finalize method on enums */
246 public final MethodSymbol enumFinalFinalize;
247
248 /** The symbol representing the close method on TWR AutoCloseable type */
249 public final MethodSymbol autoCloseableClose;
250
251 /** The predefined type that belongs to a tag.
252 */
253 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
254
255 /** The name of the class that belongs to a basic type tag.
256 */
257 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
258
259 /** A hashtable containing the encountered top-level and member classes,
260 * indexed by flat names. The table does not contain local classes.
261 * It should be updated from the outside to reflect classes defined
262 * by compiled source files.
263 */
264 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
265
266 /** A hashtable containing the encountered packages.
267 * the table should be updated from outside to reflect packages defined
268 * by compiled source files.
269 */
270 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
271
272 /** A hashtable giving the encountered modules.
273 */
274 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
275
276 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
277
278 public VarSymbol getClassField(Type type, Types types) {
279 return classFields.computeIfAbsent(
280 new UniqueType(type, types), k -> {
281 Type arg = null;
282 if (type.getTag() == ARRAY || type.getTag() == CLASS) {
283 /* Temporary treatment for primitive class: Given a primitive class V that implements
284 I1, I2, ... In, V.class is typed to be Class<? extends Object & I1 & I2 .. & In>
285 */
286 if (allowPrimitiveClasses && type.isPrimitiveClass()) {
287 List<Type> bounds = List.of(objectType).appendList(((ClassSymbol) type.tsym).getInterfaces());
288 arg = new WildcardType(bounds.size() > 1 ? types.makeIntersectionType(bounds) : objectType, BoundKind.EXTENDS, boundClass);
289 } else {
290 arg = types.erasure(type);
291 }
292 }
293 else if (type.isPrimitiveOrVoid())
294 arg = types.boxedClass(type).type;
295 else
296 throw new AssertionError(type);
297
298 Type t = new ClassType(
299 classType.getEnclosingType(), List.of(arg), classType.tsym);
300 return new VarSymbol(
301 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
302 });
303 }
304
305 public void initType(Type type, ClassSymbol c) {
306 type.tsym = c;
307 typeOfTag[type.getTag().ordinal()] = type;
308 }
309
310 public void initType(Type type, String name) {
311 initType(
312 type,
313 new ClassSymbol(
314 PUBLIC, names.fromString(name), type, rootPackage));
315 }
316
317 public void initType(Type type, String name, String bname) {
318 initType(type, name);
319 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
320 }
321
322 /** The class symbol that owns all predefined symbols.
323 */
324 public final ClassSymbol predefClass;
325
326 /** Enter a class into symbol table.
327 * @param s The name of the class.
328 */
329 private Type enterClass(String s) {
330 return enterClass(java_base, names.fromString(s)).type;
331 }
332
333 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
334 final Completer completer = type.tsym.completer;
335 type.tsym.completer = new Completer() {
336 @Override
337 public void complete(Symbol sym) throws CompletionFailure {
338 try {
339 completer.complete(sym);
340 } catch (CompletionFailure e) {
341 sym.flags_field |= (PUBLIC | INTERFACE);
342 ((ClassType) sym.type).supertype_field = objectType;
343 }
344 }
345
346 @Override
347 public boolean isTerminal() {
348 return completer.isTerminal();
349 }
350 };
351 }
352
353 public void synthesizeBoxTypeIfMissing(final Type type) {
354 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
355 final Completer completer = sym.completer;
356 sym.completer = new Completer() {
357 @Override
358 public void complete(Symbol sym) throws CompletionFailure {
359 try {
360 completer.complete(sym);
361 } catch (CompletionFailure e) {
362 sym.flags_field |= PUBLIC;
363 ((ClassType) sym.type).supertype_field = objectType;
364 MethodSymbol boxMethod =
365 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
366 new MethodType(List.of(type), sym.type,
367 List.nil(), methodClass),
368 sym);
369 sym.members().enter(boxMethod);
370 MethodSymbol unboxMethod =
371 new MethodSymbol(PUBLIC,
372 type.tsym.name.append(names.Value), // x.intValue()
373 new MethodType(List.nil(), type,
374 List.nil(), methodClass),
375 sym);
376 sym.members().enter(unboxMethod);
377 }
378 }
379
380 @Override
381 public boolean isTerminal() {
382 return completer.isTerminal();
383 }
384 };
385 }
386
387 // Enter a synthetic class that is used to mark classes in ct.sym.
388 // This class does not have a class file.
389 private Type enterSyntheticAnnotation(String name) {
390 // for now, leave the module null, to prevent problems from synthesizing the
391 // existence of a class in any specific module, including noModule
392 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
393 ClassSymbol sym = (ClassSymbol)type.tsym;
394 sym.completer = Completer.NULL_COMPLETER;
395 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
396 sym.erasure_field = type;
397 sym.members_field = WriteableScope.create(sym);
398 type.typarams_field = List.nil();
399 type.allparams_field = List.nil();
400 type.supertype_field = annotationType;
401 type.interfaces_field = List.nil();
402 return type;
403 }
404
405 /** Constructor; enters all predefined identifiers and operators
406 * into symbol table.
407 */
408 @SuppressWarnings("this-escape")
409 protected Symtab(Context context) throws CompletionFailure {
410 context.put(symtabKey, this);
411
412 names = Names.instance(context);
413
414 // Create the unknown type
415 unknownType = new UnknownType();
416
417 messages = JavacMessages.instance(context);
418
419 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context);
420
421 Target target = Target.instance(context);
422 rootPackage = new RootPackageSymbol(names.empty, null,
423 missingInfoHandler,
424 target.runtimeUseNestAccess());
425
426 // create the basic builtin symbols
427 unnamedModule = new ModuleSymbol(names.empty, null) {
428 {
429 directives = List.nil();
430 exports = List.nil();
431 provides = List.nil();
432 uses = List.nil();
433 ModuleSymbol java_base = enterModule(names.java_base);
434 com.sun.tools.javac.code.Directive.RequiresDirective d =
435 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
436 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
437 requires = List.of(d);
438 }
439 @Override
440 public String toString() {
441 return messages.getLocalizedString("compiler.misc.unnamed.module");
442 }
443 };
444 addRootPackageFor(unnamedModule);
445 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
446
447 errModule = new ModuleSymbol(names.empty, null) {
448 {
449 directives = List.nil();
450 exports = List.nil();
451 provides = List.nil();
452 uses = List.nil();
453 ModuleSymbol java_base = enterModule(names.java_base);
454 com.sun.tools.javac.code.Directive.RequiresDirective d =
455 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
456 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
457 requires = List.of(d);
458 }
459 };
460 addRootPackageFor(errModule);
461
462 noModule = new ModuleSymbol(names.empty, null) {
463 @Override public boolean isNoModule() {
464 return true;
465 }
466 };
467 addRootPackageFor(noModule);
468
469 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
470 @Override @DefinedBy(Api.LANGUAGE_MODEL)
471 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
472 return v.visitUnknown(this, p);
473 }
474 };
475
476 // create the error symbols
477 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
478 errType = new ErrorType(errSymbol, Type.noType);
479
480 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
481 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
482 unknownSymbol.type = unknownType;
483
484 // initialize builtin types
485 initType(byteType, "byte", "Byte");
486 initType(shortType, "short", "Short");
487 initType(charType, "char", "Character");
488 initType(intType, "int", "Integer");
489 initType(longType, "long", "Long");
490 initType(floatType, "float", "Float");
491 initType(doubleType, "double", "Double");
492 initType(booleanType, "boolean", "Boolean");
493 initType(voidType, "void", "Void");
494 initType(botType, "<nulltype>");
495 initType(errType, errSymbol);
496 initType(unknownType, unknownSymbol);
497
498 // the builtin class of all arrays
499 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
500
501 // VGJ
502 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
503 boundClass.members_field = new Scope.ErrorScope(boundClass);
504
505 // the builtin class of all methods
506 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
507 methodClass.members_field = new Scope.ErrorScope(boundClass);
508
509 // Create class to hold all predefined constants and operations.
510 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
511 WriteableScope scope = WriteableScope.create(predefClass);
512 predefClass.members_field = scope;
513
514 // Get the initial completer for Symbols from the ClassFinder
515 initialCompleter = ClassFinder.instance(context).getCompleter();
516 rootPackage.members_field = WriteableScope.create(rootPackage);
517
518 // Enter symbols for basic types.
519 scope.enter(byteType.tsym);
520 scope.enter(shortType.tsym);
521 scope.enter(charType.tsym);
522 scope.enter(intType.tsym);
523 scope.enter(longType.tsym);
524 scope.enter(floatType.tsym);
525 scope.enter(doubleType.tsym);
526 scope.enter(booleanType.tsym);
527 scope.enter(errType.tsym);
528
529 // Enter symbol for the errSymbol
530 scope.enter(errSymbol);
531
532 Source source = Source.instance(context);
533 if (Feature.MODULES.allowedInSource(source)) {
534 java_base = enterModule(names.java_base);
535 //avoid completing java.base during the Symtab initialization
536 java_base.completer = Completer.NULL_COMPLETER;
537 java_base.visiblePackages = Collections.emptyMap();
538 } else {
539 java_base = noModule;
540 }
541
542 // Get the initial completer for ModuleSymbols from Modules
543 moduleCompleter = Modules.instance(context).getCompleter();
544
545 // Enter predefined classes. All are assumed to be in the java.base module.
546 objectType = enterClass("java.lang.Object");
547 objectMethodsType = enterClass("java.lang.runtime.ObjectMethods");
548 objectsType = enterClass("java.util.Objects");
549 classType = enterClass("java.lang.Class");
550 stringType = enterClass("java.lang.String");
551 stringBufferType = enterClass("java.lang.StringBuffer");
552 stringBuilderType = enterClass("java.lang.StringBuilder");
553 cloneableType = enterClass("java.lang.Cloneable");
554 throwableType = enterClass("java.lang.Throwable");
555 serializableType = enterClass("java.io.Serializable");
556 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
557 varHandleType = enterClass("java.lang.invoke.VarHandle");
558 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
559 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
560 methodTypeType = enterClass("java.lang.invoke.MethodType");
561 errorType = enterClass("java.lang.Error");
562 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
563 interruptedExceptionType = enterClass("java.lang.InterruptedException");
564 exceptionType = enterClass("java.lang.Exception");
565 runtimeExceptionType = enterClass("java.lang.RuntimeException");
566 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
567 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
568 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
569 assertionErrorType = enterClass("java.lang.AssertionError");
570 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError");
571 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
572 matchExceptionType = enterClass("java.lang.MatchException");
573 nullPointerExceptionType = enterClass("java.lang.NullPointerException");
574 annotationType = enterClass("java.lang.annotation.Annotation");
575 classLoaderType = enterClass("java.lang.ClassLoader");
576 enumSym = enterClass(java_base, names.java_lang_Enum);
577 enumFinalFinalize =
578 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
579 names.finalize,
580 new MethodType(List.nil(), voidType,
581 List.nil(), methodClass),
582 enumSym);
583 listType = enterClass("java.util.List");
584 collectionsType = enterClass("java.util.Collections");
585 comparableType = enterClass("java.lang.Comparable");
586 comparatorType = enterClass("java.util.Comparator");
587 arraysType = enterClass("java.util.Arrays");
588 iterableType = enterClass("java.lang.Iterable");
589 iteratorType = enterClass("java.util.Iterator");
590 annotationTargetType = enterClass("java.lang.annotation.Target");
591 overrideType = enterClass("java.lang.Override");
592 retentionType = enterClass("java.lang.annotation.Retention");
593 deprecatedType = enterClass("java.lang.Deprecated");
594 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
595 supplierType = enterClass("java.util.function.Supplier");
596 inheritedType = enterClass("java.lang.annotation.Inherited");
597 repeatableType = enterClass("java.lang.annotation.Repeatable");
598 documentedType = enterClass("java.lang.annotation.Documented");
599 elementTypeType = enterClass("java.lang.annotation.ElementType");
600 systemType = enterClass("java.lang.System");
601 autoCloseableType = enterClass("java.lang.AutoCloseable");
602 autoCloseableClose = new MethodSymbol(PUBLIC,
603 names.close,
604 new MethodType(List.nil(), voidType,
605 List.of(exceptionType), methodClass),
606 autoCloseableType.tsym);
607 trustMeType = enterClass("java.lang.SafeVarargs");
608 nativeHeaderType = enterClass("java.lang.annotation.Native");
609 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
610 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
611 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
612 previewFeatureType = enterClass("jdk.internal.javac.PreviewFeature");
613 previewFeatureInternalType = enterSyntheticAnnotation("jdk.internal.PreviewFeature+Annotation");
614 typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor");
615 recordType = enterClass("java.lang.Record");
616 switchBootstrapsType = enterClass("java.lang.runtime.SwitchBootstraps");
617 valueBasedType = enterClass("jdk.internal.ValueBased");
618 valueBasedInternalType = enterSyntheticAnnotation("jdk.internal.ValueBased+Annotation");
619 // For serialization lint checking
620 objectStreamFieldType = enterClass("java.io.ObjectStreamField");
621 objectInputStreamType = enterClass("java.io.ObjectInputStream");
622 objectOutputStreamType = enterClass("java.io.ObjectOutputStream");
623 ioExceptionType = enterClass("java.io.IOException");
624 objectStreamExceptionType = enterClass("java.io.ObjectStreamException");
625 externalizableType = enterClass("java.io.Externalizable");
626
627 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
628 synthesizeEmptyInterfaceIfMissing(cloneableType);
629 synthesizeEmptyInterfaceIfMissing(serializableType);
630 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
631 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
632 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
633 synthesizeBoxTypeIfMissing(doubleType);
634 synthesizeBoxTypeIfMissing(floatType);
635 synthesizeBoxTypeIfMissing(voidType);
636
637 // Enter a synthetic class that is used to mark internal
638 // proprietary classes in ct.sym. This class does not have a
639 // class file.
640 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
641
642 // Enter a synthetic class that is used to provide profile info for
643 // classes in ct.sym. This class does not have a class file.
644 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
645 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
646 profileType.tsym.members().enter(m);
647
648 // Enter a class for arrays.
649 // The class implements java.lang.Cloneable and java.io.Serializable.
650 // It has a final length field and a clone method.
651 ClassType arrayClassType = (ClassType)arrayClass.type;
652 arrayClassType.supertype_field = objectType;
653 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
654 arrayClass.members_field = WriteableScope.create(arrayClass);
655 lengthVar = new VarSymbol(
656 PUBLIC | FINAL,
657 names.length,
658 intType,
659 arrayClass);
660 arrayClass.members().enter(lengthVar);
661 arrayCloneMethod = new MethodSymbol(
662 PUBLIC,
663 names.clone,
664 new MethodType(List.nil(), objectType,
665 List.nil(), methodClass),
666 arrayClass);
667 arrayClass.members().enter(arrayCloneMethod);
668
669 if (java_base != noModule)
670 java_base.completer = moduleCompleter::complete; //bootstrap issues
671 Options options = Options.instance(context);
672 allowPrimitiveClasses = Feature.PRIMITIVE_CLASSES.allowedInSource(source) && options.isSet("enablePrimitiveClasses");
673 }
674
675 /** Define a new class given its name and owner.
676 */
677 public ClassSymbol defineClass(Name name, Symbol owner) {
678 ClassSymbol c = new ClassSymbol(0, name, owner);
679 c.completer = initialCompleter;
680 return c;
681 }
682
683 /** Create a new toplevel or member class symbol with given name
684 * and owner and enter in `classes' unless already there.
685 */
686 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
687 Assert.checkNonNull(msym);
688 Name flatname = TypeSymbol.formFlatName(name, owner);
689 ClassSymbol c = getClass(msym, flatname);
690 if (c == null) {
691 c = defineClass(name, owner);
692 doEnterClass(msym, c);
693 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP &&
694 c.owner.kind == PCK && ((c.flags_field & FROM_SOURCE) == 0)) {
695 // reassign fields of classes that might have been loaded with
696 // their flat names.
697 c.owner.members().remove(c);
698 c.name = name;
699 c.owner = owner;
700 c.fullname = ClassSymbol.formFullName(name, owner);
701 }
702 return c;
703 }
704
705 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
706 Assert.checkNonNull(msym, flatName::toString);
707 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
708 }
709
710 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
711 return lookupPackage(msym, flatName, false);
712 }
713
714 private PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName, boolean onlyExisting) {
715 Assert.checkNonNull(msym);
716
717 if (flatName.isEmpty()) {
718 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
719 return msym.unnamedPackage;
720 }
721
722 if (msym == noModule) {
723 return enterPackage(msym, flatName);
724 }
725
726 msym.complete();
727
728 PackageSymbol pack;
729
730 pack = msym.visiblePackages.get(flatName);
731
732 if (pack != null)
733 return pack;
734
735 pack = getPackage(msym, flatName);
736
737 if ((pack != null && pack.exists()) || onlyExisting)
738 return pack;
739
740 boolean dependsOnUnnamed = msym.requires != null &&
741 msym.requires.stream()
742 .map(rd -> rd.module)
743 .anyMatch(mod -> mod == unnamedModule);
744
745 if (dependsOnUnnamed) {
746 //msyms depends on the unnamed module, for which we generally don't know
747 //the list of packages it "exports" ahead of time. So try to lookup the package in the
748 //current module, and in the unnamed module and see if it exists in one of them
749 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
750
751 if (unnamedPack != null && unnamedPack.exists()) {
752 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
753 return unnamedPack;
754 }
755
756 pack = enterPackage(msym, flatName);
757 pack.complete();
758 if (pack.exists())
759 return pack;
760
761 unnamedPack = enterPackage(unnamedModule, flatName);
762 unnamedPack.complete();
763 if (unnamedPack.exists()) {
764 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
765 return unnamedPack;
766 }
767
768 return pack;
769 }
770
771 return enterPackage(msym, flatName);
772 }
773
774 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
775
776 public void removeClass(ModuleSymbol msym, Name flatName) {
777 classes.getOrDefault(flatName, EMPTY).remove(msym);
778 }
779
780 public Iterable<ClassSymbol> getAllClasses() {
781 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
782 }
783
784 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
785 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
786 }
787
788 /** Create a new member or toplevel class symbol with given flat name
789 * and enter in `classes' unless already there.
790 */
791 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
792 Assert.checkNonNull(msym);
793 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
794 Assert.checkNonNull(ps);
795 Assert.checkNonNull(ps.modle);
796 ClassSymbol c = getClass(ps.modle, flatname);
797 if (c == null) {
798 c = defineClass(Convert.shortName(flatname), ps);
799 doEnterClass(ps.modle, c);
800 return c;
801 } else
802 return c;
803 }
804
805 /** Check to see if a package exists, given its fully qualified name.
806 */
807 public boolean packageExists(ModuleSymbol msym, Name fullname) {
808 Assert.checkNonNull(msym);
809 PackageSymbol pack = lookupPackage(msym, fullname, true);
810 return pack != null && pack.exists();
811 }
812
813 /** Make a package, given its fully qualified name.
814 */
815 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
816 Assert.checkNonNull(currModule);
817 PackageSymbol p = getPackage(currModule, fullname);
818 if (p == null) {
819 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
820 p = new PackageSymbol(
821 Convert.shortName(fullname),
822 enterPackage(currModule, Convert.packagePart(fullname)));
823 p.completer = initialCompleter;
824 p.modle = currModule;
825 doEnterPackage(currModule, p);
826 }
827 return p;
828 }
829
830 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
831 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
832 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
833 }
834
835 private void addRootPackageFor(ModuleSymbol module) {
836 doEnterPackage(module, rootPackage);
837 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
838 @Override
839 public String toString() {
840 return messages.getLocalizedString("compiler.misc.unnamed.package");
841 }
842 };
843 unnamedPackage.modle = module;
844 //we cannot use a method reference below, as initialCompleter might be null now
845 unnamedPackage.completer = s -> initialCompleter.complete(s);
846 unnamedPackage.flags_field |= EXISTS;
847 module.unnamedPackage = unnamedPackage;
848 }
849
850 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
851 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
852 }
853
854 public ModuleSymbol enterModule(Name name) {
855 ModuleSymbol msym = modules.get(name);
856 if (msym == null) {
857 msym = ModuleSymbol.create(name, names.module_info);
858 addRootPackageFor(msym);
859 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
860 modules.put(name, msym);
861 }
862 return msym;
863 }
864
865 public ModuleSymbol getModule(Name name) {
866 return modules.get(name);
867 }
868
869 //temporary:
870 public ModuleSymbol inferModule(Name packageName) {
871 if (packageName.isEmpty())
872 return java_base == noModule ? noModule : unnamedModule;//!
873
874 ModuleSymbol msym = null;
875 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
876 if (map == null)
877 return null;
878 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
879 if (!e.getValue().members().isEmpty()) {
880 if (msym == null) {
881 msym = e.getKey();
882 } else {
883 return null;
884 }
885 }
886 }
887 return msym;
888 }
889
890 public List<ModuleSymbol> listPackageModules(Name packageName) {
891 if (packageName.isEmpty())
892 return List.nil();
893
894 List<ModuleSymbol> result = List.nil();
895 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
896 if (map != null) {
897 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
898 if (!e.getValue().members().isEmpty()) {
899 result = result.prepend(e.getKey());
900 }
901 }
902 }
903 return result;
904 }
905
906 public Collection<ModuleSymbol> getAllModules() {
907 return modules.values();
908 }
909
910 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
911 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
912 }
913
914 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
915 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
916 }
917 }